CACAZI A68-2 One to Two Wireless Remote Control Electronic Doorbell Home Smart Digital Wireless Doorbell, Style:US Plug Features: 1. The waterproof design of the transmitter effectively prolongs the service life of the product and is safe and secure 2. Long-distance barrier-free 300-meter penetration, giving you a better experience 3. The volume can be adjusted in 4 levels, you can adjust it freely according to your needs 4. The receiver has 38 music ringtones with good sound quality and can be switched freely according to preferences 5. One for two design to cope with different occasions Product parameters: 1. Material: ABS, electronic components 2. Power supply mode: AC 3. Power supply voltage: 110220 (V) 4. Receiver: with indicator light, button, and light on 5. Transmitter: 12V 23A battery x 1 (delivered with battery) 6. Music selection: 38 music 7. Volume selection: 4 levels of volume adjustment 8. Power consumption: 1 (W) 9. Scope of application: 300 meters 10. Dimensions: Transmitter: 7.6 x 4.3 x 2.2 cm, Receiver: 9 x 5.5 x 2.5 cm